Parashas Behar · Aliyah 1 · Passuk 25:12
Chabad.org — English translation + Rashi
Torah Temimah cites Sukkah 40b.
English: “It shall be holy for you.” It was taught: Rabbi Yochanan said: Shevi’is may be desacralized either by way of sale or by way of formal chalilah.
Classical derasha (Bavli Sukkah).
Shemittah produce may be redeemed either by sale or by formal chalilah, just as hekdesh may.